Question

I have written an application that is connected to SQL database in C#.There are two forms.

I have a DataGrid in the first form. There are those columns like ID,AD,SOYAD in Datagridview.

I have a DataGrid in the second form(frm4) and there are those columns like ID,AD,SOYAD in Datagridview.

I put ContextMenuStrip in the first DataGridView.

My question is:I want to add to second DataGridView those rows which are choosen in the first DataGridView.

  frm4.dataGridView1.Rows[0].Cells[0].Value = dataGridView1.CurrentRow.Cells[0].Value.ToString();
  frm4.dataGridView1.Rows[0].Cells[1].Value = dataGridView1.CurrentRow.Cells[1].Value.ToString();
  frm4.dataGridView1.Rows[0].Cells[2].Value = dataGridView1.CurrentRow.Cells[2].Value.ToString();

I only can add one row with upper code. But,I want to add multiple rows. I’m using below code for that. But, it’s not working.

  for (int i = 0; i < length; i++)
  {
      frm4.dataGridView1.Rows[0].Cells[0].Value = dataGridView1.CurrentRow.Cells[0].Value.ToString();
      frm4.dataGridView1.Rows[0].Cells[1].Value = dataGridView1.CurrentRow.Cells[1].Value.ToString();
      frm4.dataGridView1.Rows[0].Cells[2].Value = dataGridView1.CurrentRow.Cells[2].Value.ToString();
  }

Answer 1

assume this is windows form application

private void dataGridView1_SelectionChanged(object sender, EventArgs e)
{
    if (this.dataGridView2.DataSource != null)
    {
        this.dataGridView2.DataSource = null;
    }
    else
    {
        this.dataGridView2.Rows.Clear();
    }
    for (int i = 0; i < dataGridView1.SelectedRows.Count; i++)
    {
        int index = dataGridView2.Rows.Add();
        dataGridView2.Rows[index].Cells[0].Value = dataGridView1.SelectedRows[i].Cells[0].Value.ToString();
        dataGridView2.Rows[index].Cells[1].Value = dataGridView1.SelectedRows[i].Cells[1].Value.ToString();
        .....
    }
}